Dogs can sniff out Covid a week before swabs, trial reveals
Coronavirus-detecting canines could pave the way to easing restrictions on large gatherings

Covid-sniffing dogs could become a fixture at mass events after a trial by a Belgian football club found they were highly adept at identifying infected people.
KV Oostende, who play in Belgium’s top division, partnered with a company called K9 Detection Belgium on the study. It found that specially trained dogs could detect coronavirus in a person on the first day of infection, days before conventional PCR swab tests.
Johan Weckhuysen, head of K9, told De Standaard that “there were players who tested negative via PCR, but were found to be positive with us”, adding that the nasal swabs only tested positive “eight or nine days later”.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
“If they had followed our result, the infected player would have been quarantined earlier and the virus would not have spread further in the group of players,” he added.
The dogs were trained to detect the virus over several months by regularly sniffing swabs taken from players’ armpits. By the end of the trial, K9 said they were able to detect coronavirus with 99.5% accuracy.
“Having a few thousand people take a PCR test before they are allowed to come to football is not financially and practically impossible,” said a spokesperson for KV Oostende. “We must take hold of every possibility to reopen our lives.”
Covid-detecting dogs have already been deployed at airports in Belgium, Finland and the United Arab Emirates, The Times reports.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
During an airport trial in Lebanon, “dogs screened 1,680 passengers and found 158 COVID-19 cases that were confirmed by PCR tests”, Nature says. “The animals correctly identified negative results with 100% accuracy, and correctly detected 92% of positive cases,” the journal adds.
The UK government is currently funding a £500,000 trial led by the London School of Hygiene and Tropical Medicine to train a team of “super sniffer” dogs who could screen up to 250 patients an hour, the Evening Standard says.
Sorcha Bradley is a writer at The Week and a regular on “The Week Unwrapped” podcast. She worked at The Week magazine for a year and a half before taking up her current role with the digital team, where she mostly covers UK current affairs and politics. Before joining The Week, Sorcha worked at slow-news start-up Tortoise Media. She has also written for Sky News, The Sunday Times, the London Evening Standard and Grazia magazine, among other publications. She has a master’s in newspaper journalism from City, University of London, where she specialised in political journalism.
-
Today's political cartoons - March 30, 2025
Cartoons Sunday's cartoons - strawberry fields forever, secret files, and more
By The Week US Published
-
5 hilariously sparse cartoons about further DOGE cuts
Cartoons Artists take on free audits, report cards, and more
By The Week US Published
-
Following the Tea Horse Road in China
The Week Recommends This network of roads and trails served as vital trading routes
By The Week UK Published
-
Five years on: How Covid changed everything
Feature We seem to have collectively forgotten Covid’s horrors, but they have completely reshaped politics
By The Week US Published
-
HMPV is spreading in China but there's no need to worry
The Explainer Respiratory illness is common in winter
By Devika Rao, The Week US Published
-
Marty Makary: the medical contrarian who will lead the FDA
In the Spotlight What Johns Hopkins surgeon and commentator Marty Makary will bring to the FDA
By David Faris Published
-
Long Covid: study shows damage to brain's 'control centre'
The Explainer Research could help scientists understand long-term effects of Covid-19 as well as conditions such as MS and dementia
By The Week UK Published
-
FDA OKs new Covid vaccine, available soon
Speed read The CDC recommends the new booster to combat the widely-circulating KP.2 strain
By Peter Weber, The Week US Published
-
Mpox: how dangerous is new health emergency?
Today's Big Question Spread of potentially deadly sub-variant more like early days of HIV than Covid, say scientists
By The Week UK Published
-
What is POTS and why is it more common now?
The explainer The condition affecting young women
By Devika Rao, The Week US Last updated
-
Brexit, Matt Hancock and black swans: five takeaways from Covid inquiry report
The Explainer UK was 'unprepared' for pandemic and government 'failed' citizens with flawed response, says damning report
By Harriet Marsden, The Week UK Published